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Investments in Unconsolidated Entities (Details) (USD $)
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Jun. 30, 2013
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Dec. 31, 2012
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|---|---|---|---|---|---|---|---|---|
| Guarantor Obligations [Line Items] | ||||||||
| Guarantor Obligations, Maximum Exposure, Undiscounted | $ 13,441,000 | $ 13,462,000 | ||||||
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Repayment Guarantees [Member]
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| Guarantor Obligations [Line Items] | ||||||||
| Guarantor Obligations, Maximum Exposure, Undiscounted | 198,000 | 219,000 | ||||||
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Completion Guarantees [Member]
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| Guarantor Obligations [Line Items] | ||||||||
| Guarantor Obligations, Maximum Exposure, Undiscounted | 0 | [1] | 0 | [1] | ||||
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South Edge Guarantee [Member]
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| Guarantor Obligations [Line Items] | ||||||||
| Guarantor Obligations, Maximum Exposure, Undiscounted | $ 13,243,000 | [2] | $ 13,243,000 | [2] | ||||
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